New error on old flows

[Evan Cowan]

Hi all. Im getting this error on all my flows that collate multiple PDFs and Google docs into a single PDF. 

GET https://www.googleapis.com/drive/v3/files/1uWEgslWdzk43xOTL_DqghSOzPttzPfY-Eg2mKfJWf0M/export?mimeType=application/vnd.google-apps.document
{
  "code": 400,
  "errors": [
    {
      "domain": "global",
      "location": "convertTo",
      "locationType": "parameter",
      "message": "The requested conversion is not supported.",
      "reason": "badRequest"
    }
  ],
  "message": "The requested conversion is not supported."
}

It has been working fine for years, but in the last few days, it errors out every time.

Please help!

Ta